01 -
Turn your oven on to 350°F (175°C). Grab an 8x8 baking dish, line it with parchment, and leave some extra paper hanging over the edges so you can lift the bars out easily after baking.
02 -
In a medium-sized bowl, toss together the flour, baking powder, salt, and cinnamon until it's well mixed.
03 -
Stir the melted butter with 1 1/2 cups sugar in a larger bowl until smooth. Add the eggs one by one, mixing each in thoroughly before adding the next. Pour in the vanilla and combine.
04 -
Add the dry mixture into the wet one a little at a time. Gently fold until everything is just mixed. Spread this into your prepared dish, making sure it's smooth and even.
05 -
In a small bowl, combine 2 tablespoons of sugar with your last teaspoon of cinnamon. Evenly sprinkle this all over the batter in the pan.
06 -
Pop it into the oven and bake for 25-30 minutes. The edges should look golden, and if you stick a toothpick in the center, it should come out clean or have just a few soft crumbs.
07 -
Set the pan on a wire rack and let it completely cool. Once cool, use the parchment overhang to gently lift the bars out. Cut them into squares or rectangles—your call!